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Commit | Line | Data |
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f4626df5 | 1 | #include "../git-compat-util.h" |
7e5d7768 | 2 | #include "../strbuf.h" |
f4626df5 JS |
3 | |
4 | unsigned int _CRT_fmode = _O_BINARY; | |
5 | ||
3e4a1ba0 JS |
6 | #undef open |
7 | int mingw_open (const char *filename, int oflags, ...) | |
8 | { | |
9 | va_list args; | |
10 | unsigned mode; | |
11 | va_start(args, oflags); | |
12 | mode = va_arg(args, int); | |
13 | va_end(args); | |
14 | ||
15 | if (!strcmp(filename, "/dev/null")) | |
16 | filename = "nul"; | |
17 | int fd = open(filename, oflags, mode); | |
18 | if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) { | |
19 | DWORD attrs = GetFileAttributes(filename); | |
20 | if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY)) | |
21 | errno = EISDIR; | |
22 | } | |
23 | return fd; | |
24 | } | |
25 | ||
5411bdc4 MSO |
26 | static inline time_t filetime_to_time_t(const FILETIME *ft) |
27 | { | |
28 | long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime; | |
29 | winTime -= 116444736000000000LL; /* Windows to Unix Epoch conversion */ | |
30 | winTime /= 10000000; /* Nano to seconds resolution */ | |
31 | return (time_t)winTime; | |
32 | } | |
33 | ||
fc2ded5b JS |
34 | static inline size_t size_to_blocks(size_t s) |
35 | { | |
36 | return (s+511)/512; | |
37 | } | |
38 | ||
5411bdc4 MSO |
39 | extern int _getdrive( void ); |
40 | /* We keep the do_lstat code in a separate function to avoid recursion. | |
41 | * When a path ends with a slash, the stat will fail with ENOENT. In | |
42 | * this case, we strip the trailing slashes and stat again. | |
43 | */ | |
44 | static int do_lstat(const char *file_name, struct stat *buf) | |
45 | { | |
46 | WIN32_FILE_ATTRIBUTE_DATA fdata; | |
47 | ||
48 | if (GetFileAttributesExA(file_name, GetFileExInfoStandard, &fdata)) { | |
49 | int fMode = S_IREAD; | |
50 | if (fdata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) | |
51 | fMode |= S_IFDIR; | |
52 | else | |
53 | fMode |= S_IFREG; | |
54 | if (!(fdata.dwFileAttributes & FILE_ATTRIBUTE_READONLY)) | |
55 | fMode |= S_IWRITE; | |
56 | ||
57 | buf->st_ino = 0; | |
58 | buf->st_gid = 0; | |
59 | buf->st_uid = 0; | |
5411bdc4 MSO |
60 | buf->st_mode = fMode; |
61 | buf->st_size = fdata.nFileSizeLow; /* Can't use nFileSizeHigh, since it's not a stat64 */ | |
fc2ded5b JS |
62 | buf->st_blocks = size_to_blocks(buf->st_size); |
63 | buf->st_dev = _getdrive() - 1; | |
5411bdc4 MSO |
64 | buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime)); |
65 | buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime)); | |
66 | buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime)); | |
67 | errno = 0; | |
68 | return 0; | |
69 | } | |
70 | ||
71 | switch (GetLastError()) { | |
72 | case ERROR_ACCESS_DENIED: | |
73 | case ERROR_SHARING_VIOLATION: | |
74 | case ERROR_LOCK_VIOLATION: | |
75 | case ERROR_SHARING_BUFFER_EXCEEDED: | |
76 | errno = EACCES; | |
77 | break; | |
78 | case ERROR_BUFFER_OVERFLOW: | |
79 | errno = ENAMETOOLONG; | |
80 | break; | |
81 | case ERROR_NOT_ENOUGH_MEMORY: | |
82 | errno = ENOMEM; | |
83 | break; | |
84 | default: | |
85 | errno = ENOENT; | |
86 | break; | |
87 | } | |
88 | return -1; | |
89 | } | |
90 | ||
91 | /* We provide our own lstat/fstat functions, since the provided | |
92 | * lstat/fstat functions are so slow. These stat functions are | |
93 | * tailored for Git's usage (read: fast), and are not meant to be | |
94 | * complete. Note that Git stat()s are redirected to mingw_lstat() | |
95 | * too, since Windows doesn't really handle symlinks that well. | |
96 | */ | |
fc2ded5b | 97 | int mingw_lstat(const char *file_name, struct mingw_stat *buf) |
5411bdc4 MSO |
98 | { |
99 | int namelen; | |
100 | static char alt_name[PATH_MAX]; | |
101 | ||
102 | if (!do_lstat(file_name, buf)) | |
103 | return 0; | |
104 | ||
105 | /* if file_name ended in a '/', Windows returned ENOENT; | |
106 | * try again without trailing slashes | |
107 | */ | |
108 | if (errno != ENOENT) | |
109 | return -1; | |
110 | ||
111 | namelen = strlen(file_name); | |
112 | if (namelen && file_name[namelen-1] != '/') | |
113 | return -1; | |
114 | while (namelen && file_name[namelen-1] == '/') | |
115 | --namelen; | |
116 | if (!namelen || namelen >= PATH_MAX) | |
117 | return -1; | |
118 | ||
119 | memcpy(alt_name, file_name, namelen); | |
120 | alt_name[namelen] = 0; | |
121 | return do_lstat(alt_name, buf); | |
122 | } | |
123 | ||
124 | #undef fstat | |
fc2ded5b JS |
125 | #undef stat |
126 | int mingw_fstat(int fd, struct mingw_stat *buf) | |
5411bdc4 MSO |
127 | { |
128 | HANDLE fh = (HANDLE)_get_osfhandle(fd); | |
129 | BY_HANDLE_FILE_INFORMATION fdata; | |
130 | ||
131 | if (fh == INVALID_HANDLE_VALUE) { | |
132 | errno = EBADF; | |
133 | return -1; | |
134 | } | |
135 | /* direct non-file handles to MS's fstat() */ | |
fc2ded5b JS |
136 | if (GetFileType(fh) != FILE_TYPE_DISK) { |
137 | struct stat st; | |
138 | if (fstat(fd, &st)) | |
139 | return -1; | |
140 | buf->st_ino = st.st_ino; | |
141 | buf->st_gid = st.st_gid; | |
142 | buf->st_uid = st.st_uid; | |
143 | buf->st_mode = st.st_mode; | |
144 | buf->st_size = st.st_size; | |
145 | buf->st_blocks = size_to_blocks(buf->st_size); | |
146 | buf->st_dev = st.st_dev; | |
147 | buf->st_atime = st.st_atime; | |
148 | buf->st_mtime = st.st_mtime; | |
149 | buf->st_ctime = st.st_ctime; | |
150 | return 0; | |
151 | } | |
5411bdc4 MSO |
152 | |
153 | if (GetFileInformationByHandle(fh, &fdata)) { | |
154 | int fMode = S_IREAD; | |
155 | if (fdata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) | |
156 | fMode |= S_IFDIR; | |
157 | else | |
158 | fMode |= S_IFREG; | |
159 | if (!(fdata.dwFileAttributes & FILE_ATTRIBUTE_READONLY)) | |
160 | fMode |= S_IWRITE; | |
161 | ||
162 | buf->st_ino = 0; | |
163 | buf->st_gid = 0; | |
164 | buf->st_uid = 0; | |
5411bdc4 MSO |
165 | buf->st_mode = fMode; |
166 | buf->st_size = fdata.nFileSizeLow; /* Can't use nFileSizeHigh, since it's not a stat64 */ | |
fc2ded5b JS |
167 | buf->st_blocks = size_to_blocks(buf->st_size); |
168 | buf->st_dev = _getdrive() - 1; | |
5411bdc4 MSO |
169 | buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime)); |
170 | buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime)); | |
171 | buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime)); | |
172 | return 0; | |
173 | } | |
174 | errno = EBADF; | |
175 | return -1; | |
176 | } | |
177 | ||
7c0ffa1c JS |
178 | static inline void time_t_to_filetime(time_t t, FILETIME *ft) |
179 | { | |
180 | long long winTime = t * 10000000LL + 116444736000000000LL; | |
181 | ft->dwLowDateTime = winTime; | |
182 | ft->dwHighDateTime = winTime >> 32; | |
183 | } | |
184 | ||
185 | int mingw_utime (const char *file_name, const struct utimbuf *times) | |
186 | { | |
187 | FILETIME mft, aft; | |
188 | int fh, rc; | |
189 | ||
190 | /* must have write permission */ | |
191 | if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) | |
192 | return -1; | |
193 | ||
194 | time_t_to_filetime(times->modtime, &mft); | |
195 | time_t_to_filetime(times->actime, &aft); | |
196 | if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) { | |
197 | errno = EINVAL; | |
198 | rc = -1; | |
199 | } else | |
200 | rc = 0; | |
201 | close(fh); | |
202 | return rc; | |
203 | } | |
204 | ||
f4626df5 JS |
205 | unsigned int sleep (unsigned int seconds) |
206 | { | |
207 | Sleep(seconds*1000); | |
208 | return 0; | |
209 | } | |
210 | ||
211 | int mkstemp(char *template) | |
212 | { | |
213 | char *filename = mktemp(template); | |
214 | if (filename == NULL) | |
215 | return -1; | |
216 | return open(filename, O_RDWR | O_CREAT, 0600); | |
217 | } | |
218 | ||
219 | int gettimeofday(struct timeval *tv, void *tz) | |
220 | { | |
a42a0c2e JS |
221 | SYSTEMTIME st; |
222 | struct tm tm; | |
223 | GetSystemTime(&st); | |
224 | tm.tm_year = st.wYear-1900; | |
225 | tm.tm_mon = st.wMonth-1; | |
226 | tm.tm_mday = st.wDay; | |
227 | tm.tm_hour = st.wHour; | |
228 | tm.tm_min = st.wMinute; | |
229 | tm.tm_sec = st.wSecond; | |
230 | tv->tv_sec = tm_to_time_t(&tm); | |
231 | if (tv->tv_sec < 0) | |
232 | return -1; | |
233 | tv->tv_usec = st.wMilliseconds*1000; | |
234 | return 0; | |
f4626df5 JS |
235 | } |
236 | ||
897bb8cb JS |
237 | int pipe(int filedes[2]) |
238 | { | |
239 | int fd; | |
240 | HANDLE h[2], parent; | |
241 | ||
242 | if (_pipe(filedes, 8192, 0) < 0) | |
243 | return -1; | |
244 | ||
245 | parent = GetCurrentProcess(); | |
246 | ||
247 | if (!DuplicateHandle (parent, (HANDLE)_get_osfhandle(filedes[0]), | |
248 | parent, &h[0], 0, FALSE, DUPLICATE_SAME_ACCESS)) { | |
249 | close(filedes[0]); | |
250 | close(filedes[1]); | |
251 | return -1; | |
252 | } | |
253 | if (!DuplicateHandle (parent, (HANDLE)_get_osfhandle(filedes[1]), | |
254 | parent, &h[1], 0, FALSE, DUPLICATE_SAME_ACCESS)) { | |
255 | close(filedes[0]); | |
256 | close(filedes[1]); | |
257 | CloseHandle(h[0]); | |
258 | return -1; | |
259 | } | |
260 | fd = _open_osfhandle((int)h[0], O_NOINHERIT); | |
261 | if (fd < 0) { | |
262 | close(filedes[0]); | |
263 | close(filedes[1]); | |
264 | CloseHandle(h[0]); | |
265 | CloseHandle(h[1]); | |
266 | return -1; | |
267 | } | |
268 | close(filedes[0]); | |
269 | filedes[0] = fd; | |
270 | fd = _open_osfhandle((int)h[1], O_NOINHERIT); | |
271 | if (fd < 0) { | |
272 | close(filedes[0]); | |
273 | close(filedes[1]); | |
274 | CloseHandle(h[1]); | |
275 | return -1; | |
276 | } | |
277 | close(filedes[1]); | |
278 | filedes[1] = fd; | |
279 | return 0; | |
280 | } | |
281 | ||
f4626df5 JS |
282 | int poll(struct pollfd *ufds, unsigned int nfds, int timeout) |
283 | { | |
6ed807f8 JS |
284 | int i, pending; |
285 | ||
286 | if (timeout != -1) | |
287 | return errno = EINVAL, error("poll timeout not supported"); | |
288 | ||
289 | /* When there is only one fd to wait for, then we pretend that | |
290 | * input is available and let the actual wait happen when the | |
291 | * caller invokes read(). | |
292 | */ | |
293 | if (nfds == 1) { | |
294 | if (!(ufds[0].events & POLLIN)) | |
295 | return errno = EINVAL, error("POLLIN not set"); | |
296 | ufds[0].revents = POLLIN; | |
297 | return 0; | |
298 | } | |
299 | ||
300 | repeat: | |
301 | pending = 0; | |
302 | for (i = 0; i < nfds; i++) { | |
303 | DWORD avail = 0; | |
304 | HANDLE h = (HANDLE) _get_osfhandle(ufds[i].fd); | |
305 | if (h == INVALID_HANDLE_VALUE) | |
306 | return -1; /* errno was set */ | |
307 | ||
308 | if (!(ufds[i].events & POLLIN)) | |
309 | return errno = EINVAL, error("POLLIN not set"); | |
310 | ||
311 | /* this emulation works only for pipes */ | |
312 | if (!PeekNamedPipe(h, NULL, 0, NULL, &avail, NULL)) { | |
313 | int err = GetLastError(); | |
314 | if (err == ERROR_BROKEN_PIPE) { | |
315 | ufds[i].revents = POLLHUP; | |
316 | pending++; | |
317 | } else { | |
318 | errno = EINVAL; | |
319 | return error("PeekNamedPipe failed," | |
320 | " GetLastError: %u", err); | |
321 | } | |
322 | } else if (avail) { | |
323 | ufds[i].revents = POLLIN; | |
324 | pending++; | |
325 | } else | |
326 | ufds[i].revents = 0; | |
327 | } | |
328 | if (!pending) { | |
329 | /* The only times that we spin here is when the process | |
330 | * that is connected through the pipes is waiting for | |
331 | * its own input data to become available. But since | |
332 | * the process (pack-objects) is itself CPU intensive, | |
333 | * it will happily pick up the time slice that we are | |
334 | * relinguishing here. | |
335 | */ | |
336 | Sleep(0); | |
337 | goto repeat; | |
338 | } | |
339 | return 0; | |
f4626df5 JS |
340 | } |
341 | ||
342 | struct tm *gmtime_r(const time_t *timep, struct tm *result) | |
343 | { | |
344 | /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */ | |
345 | memcpy(result, gmtime(timep), sizeof(struct tm)); | |
346 | return result; | |
347 | } | |
348 | ||
349 | struct tm *localtime_r(const time_t *timep, struct tm *result) | |
350 | { | |
351 | /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */ | |
352 | memcpy(result, localtime(timep), sizeof(struct tm)); | |
353 | return result; | |
354 | } | |
355 | ||
25fe217b JS |
356 | #undef getcwd |
357 | char *mingw_getcwd(char *pointer, int len) | |
358 | { | |
359 | int i; | |
360 | char *ret = getcwd(pointer, len); | |
361 | if (!ret) | |
362 | return ret; | |
363 | for (i = 0; pointer[i]; i++) | |
364 | if (pointer[i] == '\\') | |
365 | pointer[i] = '/'; | |
366 | return ret; | |
367 | } | |
368 | ||
6fd6aec4 JS |
369 | #undef getenv |
370 | char *mingw_getenv(const char *name) | |
371 | { | |
372 | char *result = getenv(name); | |
373 | if (!result && !strcmp(name, "TMPDIR")) { | |
374 | /* on Windows it is TMP and TEMP */ | |
375 | result = getenv("TMP"); | |
376 | if (!result) | |
377 | result = getenv("TEMP"); | |
378 | } | |
379 | return result; | |
380 | } | |
381 | ||
7e5d7768 JS |
382 | /* |
383 | * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx | |
384 | * (Parsing C++ Command-Line Arguments) | |
385 | */ | |
386 | static const char *quote_arg(const char *arg) | |
387 | { | |
388 | /* count chars to quote */ | |
389 | int len = 0, n = 0; | |
390 | int force_quotes = 0; | |
391 | char *q, *d; | |
392 | const char *p = arg; | |
393 | if (!*p) force_quotes = 1; | |
394 | while (*p) { | |
395 | if (isspace(*p) || *p == '*' || *p == '?' || *p == '{') | |
396 | force_quotes = 1; | |
397 | else if (*p == '"') | |
398 | n++; | |
399 | else if (*p == '\\') { | |
400 | int count = 0; | |
401 | while (*p == '\\') { | |
402 | count++; | |
403 | p++; | |
404 | len++; | |
405 | } | |
406 | if (*p == '"') | |
407 | n += count*2 + 1; | |
408 | continue; | |
409 | } | |
410 | len++; | |
411 | p++; | |
412 | } | |
413 | if (!force_quotes && n == 0) | |
414 | return arg; | |
415 | ||
416 | /* insert \ where necessary */ | |
417 | d = q = xmalloc(len+n+3); | |
418 | *d++ = '"'; | |
419 | while (*arg) { | |
420 | if (*arg == '"') | |
421 | *d++ = '\\'; | |
422 | else if (*arg == '\\') { | |
423 | int count = 0; | |
424 | while (*arg == '\\') { | |
425 | count++; | |
426 | *d++ = *arg++; | |
427 | } | |
428 | if (*arg == '"') { | |
429 | while (count-- > 0) | |
430 | *d++ = '\\'; | |
431 | *d++ = '\\'; | |
432 | } | |
433 | } | |
434 | *d++ = *arg++; | |
435 | } | |
436 | *d++ = '"'; | |
437 | *d++ = 0; | |
438 | return q; | |
439 | } | |
440 | ||
f1a4dfb8 JS |
441 | static const char *parse_interpreter(const char *cmd) |
442 | { | |
443 | static char buf[100]; | |
444 | char *p, *opt; | |
445 | int n, fd; | |
446 | ||
447 | /* don't even try a .exe */ | |
448 | n = strlen(cmd); | |
449 | if (n >= 4 && !strcasecmp(cmd+n-4, ".exe")) | |
450 | return NULL; | |
451 | ||
452 | fd = open(cmd, O_RDONLY); | |
453 | if (fd < 0) | |
454 | return NULL; | |
455 | n = read(fd, buf, sizeof(buf)-1); | |
456 | close(fd); | |
457 | if (n < 4) /* at least '#!/x' and not error */ | |
458 | return NULL; | |
459 | ||
460 | if (buf[0] != '#' || buf[1] != '!') | |
461 | return NULL; | |
462 | buf[n] = '\0'; | |
463 | p = strchr(buf, '\n'); | |
464 | if (!p) | |
465 | return NULL; | |
466 | ||
467 | *p = '\0'; | |
468 | if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\'))) | |
469 | return NULL; | |
470 | /* strip options */ | |
471 | if ((opt = strchr(p+1, ' '))) | |
472 | *opt = '\0'; | |
473 | return p+1; | |
474 | } | |
475 | ||
476 | /* | |
477 | * Splits the PATH into parts. | |
478 | */ | |
479 | static char **get_path_split(void) | |
480 | { | |
481 | char *p, **path, *envpath = getenv("PATH"); | |
482 | int i, n = 0; | |
483 | ||
484 | if (!envpath || !*envpath) | |
485 | return NULL; | |
486 | ||
487 | envpath = xstrdup(envpath); | |
488 | p = envpath; | |
489 | while (p) { | |
490 | char *dir = p; | |
491 | p = strchr(p, ';'); | |
492 | if (p) *p++ = '\0'; | |
493 | if (*dir) { /* not earlier, catches series of ; */ | |
494 | ++n; | |
495 | } | |
496 | } | |
497 | if (!n) | |
498 | return NULL; | |
499 | ||
500 | path = xmalloc((n+1)*sizeof(char*)); | |
501 | p = envpath; | |
502 | i = 0; | |
503 | do { | |
504 | if (*p) | |
505 | path[i++] = xstrdup(p); | |
506 | p = p+strlen(p)+1; | |
507 | } while (i < n); | |
508 | path[i] = NULL; | |
509 | ||
510 | free(envpath); | |
511 | ||
512 | return path; | |
513 | } | |
514 | ||
515 | static void free_path_split(char **path) | |
516 | { | |
517 | if (!path) | |
518 | return; | |
519 | ||
520 | char **p = path; | |
521 | while (*p) | |
522 | free(*p++); | |
523 | free(path); | |
524 | } | |
525 | ||
526 | /* | |
527 | * exe_only means that we only want to detect .exe files, but not scripts | |
528 | * (which do not have an extension) | |
529 | */ | |
530 | static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only) | |
531 | { | |
532 | char path[MAX_PATH]; | |
533 | snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd); | |
534 | ||
535 | if (!isexe && access(path, F_OK) == 0) | |
536 | return xstrdup(path); | |
537 | path[strlen(path)-4] = '\0'; | |
538 | if ((!exe_only || isexe) && access(path, F_OK) == 0) | |
539 | return xstrdup(path); | |
540 | return NULL; | |
541 | } | |
542 | ||
543 | /* | |
544 | * Determines the absolute path of cmd using the the split path in path. | |
545 | * If cmd contains a slash or backslash, no lookup is performed. | |
546 | */ | |
547 | static char *path_lookup(const char *cmd, char **path, int exe_only) | |
548 | { | |
549 | char *prog = NULL; | |
550 | int len = strlen(cmd); | |
551 | int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe"); | |
552 | ||
553 | if (strchr(cmd, '/') || strchr(cmd, '\\')) | |
554 | prog = xstrdup(cmd); | |
555 | ||
556 | while (!prog && *path) | |
557 | prog = lookup_prog(*path++, cmd, isexe, exe_only); | |
558 | ||
559 | return prog; | |
560 | } | |
561 | ||
7e5d7768 JS |
562 | static int env_compare(const void *a, const void *b) |
563 | { | |
564 | char *const *ea = a; | |
565 | char *const *eb = b; | |
566 | return strcasecmp(*ea, *eb); | |
567 | } | |
568 | ||
569 | static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env, | |
570 | int prepend_cmd) | |
571 | { | |
572 | STARTUPINFO si; | |
573 | PROCESS_INFORMATION pi; | |
574 | struct strbuf envblk, args; | |
575 | unsigned flags; | |
576 | BOOL ret; | |
577 | ||
578 | /* Determine whether or not we are associated to a console */ | |
579 | HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE, | |
580 | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, | |
581 | FILE_ATTRIBUTE_NORMAL, NULL); | |
582 | if (cons == INVALID_HANDLE_VALUE) { | |
583 | /* There is no console associated with this process. | |
584 | * Since the child is a console process, Windows | |
585 | * would normally create a console window. But | |
586 | * since we'll be redirecting std streams, we do | |
587 | * not need the console. | |
588 | */ | |
589 | flags = CREATE_NO_WINDOW; | |
590 | } else { | |
591 | /* There is already a console. If we specified | |
592 | * CREATE_NO_WINDOW here, too, Windows would | |
593 | * disassociate the child from the console. | |
594 | * Go figure! | |
595 | */ | |
596 | flags = 0; | |
597 | CloseHandle(cons); | |
598 | } | |
599 | memset(&si, 0, sizeof(si)); | |
600 | si.cb = sizeof(si); | |
601 | si.dwFlags = STARTF_USESTDHANDLES; | |
602 | si.hStdInput = (HANDLE) _get_osfhandle(0); | |
603 | si.hStdOutput = (HANDLE) _get_osfhandle(1); | |
604 | si.hStdError = (HANDLE) _get_osfhandle(2); | |
605 | ||
606 | /* concatenate argv, quoting args as we go */ | |
607 | strbuf_init(&args, 0); | |
608 | if (prepend_cmd) { | |
609 | char *quoted = (char *)quote_arg(cmd); | |
610 | strbuf_addstr(&args, quoted); | |
611 | if (quoted != cmd) | |
612 | free(quoted); | |
613 | } | |
614 | for (; *argv; argv++) { | |
615 | char *quoted = (char *)quote_arg(*argv); | |
616 | if (*args.buf) | |
617 | strbuf_addch(&args, ' '); | |
618 | strbuf_addstr(&args, quoted); | |
619 | if (quoted != *argv) | |
620 | free(quoted); | |
621 | } | |
622 | ||
623 | if (env) { | |
624 | int count = 0; | |
625 | char **e, **sorted_env; | |
626 | ||
627 | for (e = env; *e; e++) | |
628 | count++; | |
629 | ||
630 | /* environment must be sorted */ | |
631 | sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1)); | |
632 | memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1)); | |
633 | qsort(sorted_env, count, sizeof(*sorted_env), env_compare); | |
634 | ||
635 | strbuf_init(&envblk, 0); | |
636 | for (e = sorted_env; *e; e++) { | |
637 | strbuf_addstr(&envblk, *e); | |
638 | strbuf_addch(&envblk, '\0'); | |
639 | } | |
640 | free(sorted_env); | |
641 | } | |
642 | ||
643 | memset(&pi, 0, sizeof(pi)); | |
644 | ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags, | |
645 | env ? envblk.buf : NULL, NULL, &si, &pi); | |
646 | ||
647 | if (env) | |
648 | strbuf_release(&envblk); | |
649 | strbuf_release(&args); | |
650 | ||
651 | if (!ret) { | |
652 | errno = ENOENT; | |
653 | return -1; | |
654 | } | |
655 | CloseHandle(pi.hThread); | |
656 | return (pid_t)pi.hProcess; | |
657 | } | |
658 | ||
659 | pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env) | |
660 | { | |
661 | pid_t pid; | |
662 | char **path = get_path_split(); | |
663 | char *prog = path_lookup(cmd, path, 0); | |
664 | ||
665 | if (!prog) { | |
666 | errno = ENOENT; | |
667 | pid = -1; | |
668 | } | |
669 | else { | |
670 | const char *interpr = parse_interpreter(prog); | |
671 | ||
672 | if (interpr) { | |
673 | const char *argv0 = argv[0]; | |
674 | char *iprog = path_lookup(interpr, path, 1); | |
675 | argv[0] = prog; | |
676 | if (!iprog) { | |
677 | errno = ENOENT; | |
678 | pid = -1; | |
679 | } | |
680 | else { | |
681 | pid = mingw_spawnve(iprog, argv, env, 1); | |
682 | free(iprog); | |
683 | } | |
684 | argv[0] = argv0; | |
685 | } | |
686 | else | |
687 | pid = mingw_spawnve(prog, argv, env, 0); | |
688 | free(prog); | |
689 | } | |
690 | free_path_split(path); | |
691 | return pid; | |
692 | } | |
693 | ||
f1a4dfb8 JS |
694 | static int try_shell_exec(const char *cmd, char *const *argv, char **env) |
695 | { | |
696 | const char *interpr = parse_interpreter(cmd); | |
697 | char **path; | |
698 | char *prog; | |
699 | int pid = 0; | |
700 | ||
701 | if (!interpr) | |
702 | return 0; | |
703 | path = get_path_split(); | |
704 | prog = path_lookup(interpr, path, 1); | |
705 | if (prog) { | |
706 | int argc = 0; | |
707 | const char **argv2; | |
708 | while (argv[argc]) argc++; | |
7e5d7768 JS |
709 | argv2 = xmalloc(sizeof(*argv) * (argc+1)); |
710 | argv2[0] = (char *)cmd; /* full path to the script file */ | |
711 | memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc); | |
712 | pid = mingw_spawnve(prog, argv2, env, 1); | |
f1a4dfb8 JS |
713 | if (pid >= 0) { |
714 | int status; | |
715 | if (waitpid(pid, &status, 0) < 0) | |
716 | status = 255; | |
717 | exit(status); | |
718 | } | |
719 | pid = 1; /* indicate that we tried but failed */ | |
720 | free(prog); | |
721 | free(argv2); | |
722 | } | |
723 | free_path_split(path); | |
724 | return pid; | |
725 | } | |
726 | ||
727 | static void mingw_execve(const char *cmd, char *const *argv, char *const *env) | |
728 | { | |
729 | /* check if git_command is a shell script */ | |
730 | if (!try_shell_exec(cmd, argv, (char **)env)) { | |
731 | int pid, status; | |
732 | ||
7e5d7768 | 733 | pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0); |
f1a4dfb8 JS |
734 | if (pid < 0) |
735 | return; | |
736 | if (waitpid(pid, &status, 0) < 0) | |
737 | status = 255; | |
738 | exit(status); | |
739 | } | |
740 | } | |
741 | ||
742 | void mingw_execvp(const char *cmd, char *const *argv) | |
743 | { | |
744 | char **path = get_path_split(); | |
745 | char *prog = path_lookup(cmd, path, 0); | |
746 | ||
747 | if (prog) { | |
748 | mingw_execve(prog, argv, environ); | |
749 | free(prog); | |
750 | } else | |
751 | errno = ENOENT; | |
752 | ||
753 | free_path_split(path); | |
754 | } | |
755 | ||
ba26f296 JS |
756 | char **copy_environ() |
757 | { | |
758 | char **env; | |
759 | int i = 0; | |
760 | while (environ[i]) | |
761 | i++; | |
762 | env = xmalloc((i+1)*sizeof(*env)); | |
763 | for (i = 0; environ[i]; i++) | |
764 | env[i] = xstrdup(environ[i]); | |
765 | env[i] = NULL; | |
766 | return env; | |
767 | } | |
768 | ||
769 | void free_environ(char **env) | |
770 | { | |
771 | int i; | |
772 | for (i = 0; env[i]; i++) | |
773 | free(env[i]); | |
774 | free(env); | |
775 | } | |
776 | ||
777 | static int lookup_env(char **env, const char *name, size_t nmln) | |
778 | { | |
779 | int i; | |
780 | ||
781 | for (i = 0; env[i]; i++) { | |
782 | if (0 == strncmp(env[i], name, nmln) | |
783 | && '=' == env[i][nmln]) | |
784 | /* matches */ | |
785 | return i; | |
786 | } | |
787 | return -1; | |
788 | } | |
789 | ||
790 | /* | |
791 | * If name contains '=', then sets the variable, otherwise it unsets it | |
792 | */ | |
793 | char **env_setenv(char **env, const char *name) | |
794 | { | |
795 | char *eq = strchrnul(name, '='); | |
796 | int i = lookup_env(env, name, eq-name); | |
797 | ||
798 | if (i < 0) { | |
799 | if (*eq) { | |
800 | for (i = 0; env[i]; i++) | |
801 | ; | |
802 | env = xrealloc(env, (i+2)*sizeof(*env)); | |
803 | env[i] = xstrdup(name); | |
804 | env[i+1] = NULL; | |
805 | } | |
806 | } | |
807 | else { | |
808 | free(env[i]); | |
809 | if (*eq) | |
810 | env[i] = xstrdup(name); | |
811 | else | |
812 | for (; env[i]; i++) | |
813 | env[i] = env[i+1]; | |
814 | } | |
815 | return env; | |
816 | } | |
817 | ||
746fb857 JS |
818 | /* this is the first function to call into WS_32; initialize it */ |
819 | #undef gethostbyname | |
820 | struct hostent *mingw_gethostbyname(const char *host) | |
821 | { | |
822 | WSADATA wsa; | |
823 | ||
824 | if (WSAStartup(MAKEWORD(2,2), &wsa)) | |
825 | die("unable to initialize winsock subsystem, error %d", | |
826 | WSAGetLastError()); | |
827 | atexit((void(*)(void)) WSACleanup); | |
828 | return gethostbyname(host); | |
829 | } | |
830 | ||
831 | int mingw_socket(int domain, int type, int protocol) | |
832 | { | |
833 | int sockfd; | |
834 | SOCKET s = WSASocket(domain, type, protocol, NULL, 0, 0); | |
835 | if (s == INVALID_SOCKET) { | |
836 | /* | |
837 | * WSAGetLastError() values are regular BSD error codes | |
838 | * biased by WSABASEERR. | |
839 | * However, strerror() does not know about networking | |
840 | * specific errors, which are values beginning at 38 or so. | |
841 | * Therefore, we choose to leave the biased error code | |
842 | * in errno so that _if_ someone looks up the code somewhere, | |
843 | * then it is at least the number that are usually listed. | |
844 | */ | |
845 | errno = WSAGetLastError(); | |
846 | return -1; | |
847 | } | |
848 | /* convert into a file descriptor */ | |
849 | if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) { | |
850 | closesocket(s); | |
851 | return error("unable to make a socket file descriptor: %s", | |
852 | strerror(errno)); | |
853 | } | |
854 | return sockfd; | |
855 | } | |
856 | ||
857 | #undef connect | |
858 | int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz) | |
859 | { | |
860 | SOCKET s = (SOCKET)_get_osfhandle(sockfd); | |
861 | return connect(s, sa, sz); | |
862 | } | |
863 | ||
ea9e98c3 JS |
864 | #undef rename |
865 | int mingw_rename(const char *pold, const char *pnew) | |
866 | { | |
867 | /* | |
868 | * Try native rename() first to get errno right. | |
869 | * It is based on MoveFile(), which cannot overwrite existing files. | |
870 | */ | |
871 | if (!rename(pold, pnew)) | |
872 | return 0; | |
873 | if (errno != EEXIST) | |
874 | return -1; | |
875 | if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING)) | |
876 | return 0; | |
877 | /* TODO: translate more errors */ | |
878 | if (GetLastError() == ERROR_ACCESS_DENIED) { | |
879 | DWORD attrs = GetFileAttributes(pnew); | |
880 | if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY)) { | |
881 | errno = EISDIR; | |
882 | return -1; | |
883 | } | |
884 | } | |
885 | errno = EACCES; | |
886 | return -1; | |
887 | } | |
888 | ||
f4626df5 JS |
889 | struct passwd *getpwuid(int uid) |
890 | { | |
f7597aca | 891 | static char user_name[100]; |
f4626df5 | 892 | static struct passwd p; |
f7597aca JS |
893 | |
894 | DWORD len = sizeof(user_name); | |
895 | if (!GetUserName(user_name, &len)) | |
896 | return NULL; | |
897 | p.pw_name = user_name; | |
898 | p.pw_gecos = "unknown"; | |
899 | p.pw_dir = NULL; | |
f4626df5 JS |
900 | return &p; |
901 | } | |
902 | ||
6072fc31 JS |
903 | static HANDLE timer_event; |
904 | static HANDLE timer_thread; | |
905 | static int timer_interval; | |
906 | static int one_shot; | |
907 | static sig_handler_t timer_fn = SIG_DFL; | |
908 | ||
909 | /* The timer works like this: | |
910 | * The thread, ticktack(), is a trivial routine that most of the time | |
911 | * only waits to receive the signal to terminate. The main thread tells | |
912 | * the thread to terminate by setting the timer_event to the signalled | |
913 | * state. | |
914 | * But ticktack() interrupts the wait state after the timer's interval | |
915 | * length to call the signal handler. | |
916 | */ | |
917 | ||
918 | static __stdcall unsigned ticktack(void *dummy) | |
919 | { | |
920 | while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) { | |
921 | if (timer_fn == SIG_DFL) | |
922 | die("Alarm"); | |
923 | if (timer_fn != SIG_IGN) | |
924 | timer_fn(SIGALRM); | |
925 | if (one_shot) | |
926 | break; | |
927 | } | |
928 | return 0; | |
929 | } | |
930 | ||
931 | static int start_timer_thread(void) | |
932 | { | |
933 | timer_event = CreateEvent(NULL, FALSE, FALSE, NULL); | |
934 | if (timer_event) { | |
935 | timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL); | |
936 | if (!timer_thread ) | |
937 | return errno = ENOMEM, | |
938 | error("cannot start timer thread"); | |
939 | } else | |
940 | return errno = ENOMEM, | |
941 | error("cannot allocate resources for timer"); | |
942 | return 0; | |
943 | } | |
944 | ||
945 | static void stop_timer_thread(void) | |
946 | { | |
947 | if (timer_event) | |
948 | SetEvent(timer_event); /* tell thread to terminate */ | |
949 | if (timer_thread) { | |
950 | int rc = WaitForSingleObject(timer_thread, 1000); | |
951 | if (rc == WAIT_TIMEOUT) | |
952 | error("timer thread did not terminate timely"); | |
953 | else if (rc != WAIT_OBJECT_0) | |
954 | error("waiting for timer thread failed: %lu", | |
955 | GetLastError()); | |
956 | CloseHandle(timer_thread); | |
957 | } | |
958 | if (timer_event) | |
959 | CloseHandle(timer_event); | |
960 | timer_event = NULL; | |
961 | timer_thread = NULL; | |
962 | } | |
963 | ||
964 | static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2) | |
965 | { | |
966 | return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec; | |
967 | } | |
968 | ||
f4626df5 JS |
969 | int setitimer(int type, struct itimerval *in, struct itimerval *out) |
970 | { | |
6072fc31 JS |
971 | static const struct timeval zero; |
972 | static int atexit_done; | |
973 | ||
974 | if (out != NULL) | |
975 | return errno = EINVAL, | |
976 | error("setitimer param 3 != NULL not implemented"); | |
977 | if (!is_timeval_eq(&in->it_interval, &zero) && | |
978 | !is_timeval_eq(&in->it_interval, &in->it_value)) | |
979 | return errno = EINVAL, | |
980 | error("setitimer: it_interval must be zero or eq it_value"); | |
981 | ||
982 | if (timer_thread) | |
983 | stop_timer_thread(); | |
984 | ||
985 | if (is_timeval_eq(&in->it_value, &zero) && | |
986 | is_timeval_eq(&in->it_interval, &zero)) | |
987 | return 0; | |
988 | ||
989 | timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000; | |
990 | one_shot = is_timeval_eq(&in->it_interval, &zero); | |
991 | if (!atexit_done) { | |
992 | atexit(stop_timer_thread); | |
993 | atexit_done = 1; | |
994 | } | |
995 | return start_timer_thread(); | |
f4626df5 JS |
996 | } |
997 | ||
998 | int sigaction(int sig, struct sigaction *in, struct sigaction *out) | |
999 | { | |
6072fc31 JS |
1000 | if (sig != SIGALRM) |
1001 | return errno = EINVAL, | |
1002 | error("sigaction only implemented for SIGALRM"); | |
1003 | if (out != NULL) | |
1004 | return errno = EINVAL, | |
1005 | error("sigaction: param 3 != NULL not implemented"); | |
1006 | ||
1007 | timer_fn = in->sa_handler; | |
1008 | return 0; | |
1009 | } | |
1010 | ||
1011 | #undef signal | |
1012 | sig_handler_t mingw_signal(int sig, sig_handler_t handler) | |
1013 | { | |
1014 | if (sig != SIGALRM) | |
1015 | return signal(sig, handler); | |
1016 | sig_handler_t old = timer_fn; | |
1017 | timer_fn = handler; | |
1018 | return old; | |
f4626df5 | 1019 | } |